Cluster-top.



B. BiRNBAUW & A. L. ELIASOFF.

' CLUSTER TOP.

APPLICATION FILED FEB. 16, 1912.

Patented Aug. 28, 1917.

' WITNESSES MTOR/VES r kid Sd A L. ELIASOEF AND CHARLES BiBNBA-UIVI, OF NEW YORK, N. Y.

CLUSTER-TOP.

Specification of Letters Patent.

Application liled February 16, 1917. Serial No. 149,004.

To all whom it may concern:

Be it known that we, ABRAHAM 'L. EL1A- sorr and CHARLES BrRNBAUM,--both citizens of the United States, and residents of the city of New York, borough of the Bronx,

in the county of Bronx and State of New York, have invented a new and Improved- Cluster-Top, of which the following is'a full, clear, and exact description.

- jAmong the principal objects which the present invention has in view are: to furnish a metallic light-reflecting member for simulating the under body of a gem; to reinforce settings for massed small stone clusters; and'to provide a reinforcing memher for the purpose above stated having centrally-disposed li ht-refracting surfaces for simulating the re racted rays peculiar to certain gems.

I Draw-mgr. Figure 1 is aside view on anenl arged scale, of a fragment of a ring having mounted thereon a cluster constructed and 3 arranged in accordance with the present in- Description.

As seen best in Fig. 2 of'the drawings, what is herein termed a cluster comprises a grid 9, a plurality of gems rigidly mounted therein and extending through perforations 11 formed in said grid, and a reinforcing under body 12. The grid 9 is.

preferably made as light as possible. To reinforce this structure, the under body 12 has a series of radially-disposed arms 13 and a series of contracted arms 14. The ends of the arms 14 are rigidly attached to an encompassing ring 15, the circumference of which is slightly greater than the opening of the central socket 16 in the grid 9. The circular disposition of the terminal ends of the arms 14 is maintained by the ring 15.

The gems 10 are secured in the sockets 11 and 16 in any suitable manner. The present invention provides additional securing devices such as the heads 17, which are overturned on the gems. The exposed sur- "faces of the heads 17 are subsequently buffed or polished to form reflecting surfaces which effects an augmentation of the scintillation of the gems.

A similar purpose is served by straight facets 18 formed on the sides of the arms 13 and by the curved surfaces 19 of the arms 14. The facets 18 and surfaces 19 reflect the light received thereon through the openings between the claws 2O employed for mounting the cluster.

When a ring thus provided is seen from apoint at one side thereof, the scintillations of light thrown from the facets 18 and the surfaces 19 assist in the illusion produced by the cluster that the setting is a single solid em. The upper portions of the arms '14 reflect light upward into the gems.

To further assist in this illusion the metal from which the gridz9 and under body are formed, :is platinum or other suitable and preferably white metal. The illusion is augmented when, the gems 10 are diamonds and the grid 9 and reinforcing under bodytherefor are of the white metal referred to. When the cluster is viewed from the the upper side, the illusion referred to is further augmented by the reflecting surfaces of the heads 17 from which the light is reflected as from the facets of the adjacent gems 10. These scintillating points operate to distract the attention from the otherwise plain surfaces of the grid 9.

1. A cluster top comprising a crown grid having formed therein a series of annularly disposed open-ended sockets, a reinforcing under body having a series of supporting arms radially disposed, the ends of said arms being rigidly attached to said grid adjacent the perimeter thereof, said arms being each bent lengthwise to provide a plurality of divergent light-reflecting surfaces, and a series of upwardly-extended converged arms mounted on said under body, the upper ends of said armsbeing centrally converged and the sides of said converged arms being shaped to provide surfaces for reflecting .light laterally from the center of said under body between the first-mentioned arms.

2. Acluster top comprising a crown grid having formed therein a series of annularly disposed open-ended sockets, a reinforcing under body having a series of supporting arms radially disposed, the ends of said arms being rigidly attached to said grid adjacent the perimeter thereof, said arms being each bent lengthwise to provide a plurality of divergent light-reflecting surfaces, a series of upwardly-extended converged arms mounted on said under body, the upper ends of said arms being centrally converged and the sides of said converged arms being shaped to prowide surfaces for, reflecting light laterally from the center of said under body between the first-mentioned arms; and "means for structurally connecting the ends of said con- 10 verged arms.

ABRAHAM L. EIIJIASOFIF. CHARLES BIRNBAUM. 

